Rupture on target breaks my stealth after i vanish

[Strasse-tichondrius]

Confirmed abilities breaking Stealth in PvP

Another thing breaking stealth is the Hero passive called Hand of Fate. Flip a coin each time a finishing move consumes 5 combo points. All rogues use 5 combo points in stealth to slice and dice before opener. If the coin lands on tails it will do instant cosmic damage which will pull you out of stealth.

In your case, its the Singular focus hero talent.